Public bug reported: Best way to reproduce:
1) Go to my ppa: http://launchpad.net/~pktoss/+archive 2) Copy the eclipse - 3.4.1-0~pkt2 package to your own ppa or download to an intrepid machine 3) Start a build: either amd64/i386 will work :( - or when at home: cd eclipse-3.4.1 && debuild 4) Wait 40-50 minutes (hey, this is eclipse we are talking about :) 5) Observe it hang with "Generate X" where X is between 1 and 5 In reality, in all X cases it is hanging inside a java application that generates metadata (different app for each value of X). It is hanging in futex(..., FUTEX_WAIT, ...) (as an strace will convince you) A potentially interesting fact is that the "val" in the above call is always PID+1 i.e., if the PID of the hung java process is 5000 the above call will be like futex(<an_addr>, FUTEX_WAIT, 5001, NULL, ...) Unfortunately you won't be able to (at least I couldn't) reproduce by running just the app or even by just running the install.sh script in debian/scripts that contains this command. You have to run the full "debuild" for the bug to appear :( Another perhaps useful fact is that the package build will complete fine in debian sid which has a slightly older openjdk (b11 instead of b12 in intrepid). The bug has been reproduced in the following kernel/arch configurations: * 2.6.27/amd64 (latest intrepid kernel) inside a KVM VM * 2.6.28-rc8/amd64 slightly customized (small trivial one liners - network card bugfixes) physical machine * 2.6.21/i386 (an EC2 node) * Whatever the autobuilders run / both i386 and amd64 In a debian sid chroot in the customized 2.6.28-rc8/amd64 machine the "debuild" has succeeded all times so far. The problem is of course that debian sid also has a different libc ;-) Unfortunately, I don't have the time to completely debug this (e.g., one might want to know what files/streams are open by the hung process, etc) and I also have no familiarity with the openjdk internals. So, I 'm filing this in case anyone would be interested to look and will try to "hack around" this on the build until there is a "proper" solution. Thanks ** Affects: openjdk-6 (Ubuntu) Importance: Undecided Status: New -- Strange openjdk hang in FUTEX_WAIT https://bugs.launchpad.net/bugs/309407 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
